Mute all channels but one

I ran into a thing today where I asked a question in a help channel and I had to keep checking the server and navigating to that specific channel to check if it was answered. It's a large public server so I have it muted. It would be awesome to have a server totally muted but allow for one channel to put a notification mark (the little gray thing) on the server icon. It would help if someone is active on one channel on a server and only needs to know if a message is sent to that specific channel.